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Message-ID: <d55c968a-d953-67d7-cdff-f856422607f5@broadcom.com>
Date:   Fri, 20 Oct 2023 11:57:42 +0200
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From:   Arend van Spriel <arend.vanspriel@broadcom.com>
Subject: Re: [PATCH 1/5] [brcmfmac] Add support for encoding/decoding 6g
 chanspecs
To:     Daniel Berlin <dberlin@dberlin.org>,
        Arend van Spriel <aspriel@gmail.com>,
        Franky Lin <franky.lin@broadcom.com>,
        Hante Meuleman <hante.meuleman@broadcom.com>
Cc:     linux-wireless@vger.kernel.org,
        brcm80211-dev-list.pdl@broadcom.com,
        SHA-cyfmac-dev-list@infineon.com, linux-kernel@vger.kernel.org
References: <cover.1697650207.git.dberlin@dberlin.org>
 <0b95944fcf047b3ec83cecb0c65ca24de43810fd.1697650207.git.dberlin@dberlin.org>
In-Reply-To: <0b95944fcf047b3ec83cecb0c65ca24de43810fd.1697650207.git.dberlin@dberlin.org>
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On 10/19/2023 3:42 AM, Daniel Berlin wrote:
> This patch adds support for 6G chanspecs, as part of adding 6G and
> 802.11ax support.
> 
> I added the correct values for the upcoming 320mhz as well so that the
> info is complete.

Reviewed-by: Arend van Spriel <arend.vanspriel@broadcom.com>> 
Signed-off-by: Daniel Berlin <dberlin@dberlin.org>
> ---
>   .../broadcom/brcm80211/brcmutil/d11.c         | 46 +++++++++++++++----
>   .../broadcom/brcm80211/include/brcmu_d11.h    | 46 +++++++++++++------
>   .../broadcom/brcm80211/include/brcmu_wifi.h   | 27 ++++++++---
>   3 files changed, 89 insertions(+), 30 deletions(-)
> 
> diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmutil/d11.c b/drivers/net/wireless/broadcom/brcm80211/brcmutil/d11.c
> index 1e2b1e487eb7..faf7eeeeb2d5 100644
> --- a/drivers/net/wireless/broadcom/brcm80211/brcmutil/d11.c
> +++ b/drivers/net/wireless/broadcom/brcm80211/brcmutil/d11.c

[...]

> @@ -117,7 +127,9 @@ static void brcmu_d11n_decchspec(struct brcmu_chan *ch)
>   		}
>   		break;
>   	default:
> -		WARN_ONCE(1, "Invalid chanspec 0x%04x\n", ch->chspec);
> +		WARN_ONCE(1,
> +			  "Invalid chanspec - unknown 11n bandwidth 0x%04x\n",
> +			  ch->chspec);

I don't think this provides more info. The WARN_ONCE() already prints 
code location and stack trace.

>   		break;
>   	}
>   
> @@ -129,7 +141,8 @@ static void brcmu_d11n_decchspec(struct brcmu_chan *ch)
>   		ch->band = BRCMU_CHAN_BAND_2G;
>   		break;
>   	default:
> -		WARN_ONCE(1, "Invalid chanspec 0x%04x\n", ch->chspec);
> +		WARN_ONCE(1, "Invalid chanspec - unknown 11n band 0x%04x\n",
> +			  ch->chspec);

ditto

>   		break;
>   	}
>   }
> @@ -156,7 +169,9 @@ static void brcmu_d11ac_decchspec(struct brcmu_chan *ch)
>   			ch->sb = BRCMU_CHAN_SB_U;
>   			ch->control_ch_num += CH_10MHZ_APART;
>   		} else {
> -			WARN_ONCE(1, "Invalid chanspec 0x%04x\n", ch->chspec);
> +			WARN_ONCE(1,
> +				  "Invalid chanspec - unknown 11ac channel distance 0x%04x\n",
> +				  ch->chspec);

ditto

>   		}
>   		break;
>   	case BRCMU_CHSPEC_D11AC_BW_80:
> @@ -177,7 +192,9 @@ static void brcmu_d11ac_decchspec(struct brcmu_chan *ch)
>   			ch->control_ch_num += CH_30MHZ_APART;
>   			break;
>   		default:
> -			WARN_ONCE(1, "Invalid chanspec 0x%04x\n", ch->chspec);
> +			WARN_ONCE(1,
> +				  "Invalid chanspec - unknown 11ac channel distance 0x%04x\n",
> +				  ch->chspec);

ditto

>   			break;
>   		}
>   		break;
> @@ -211,17 +228,24 @@ static void brcmu_d11ac_decchspec(struct brcmu_chan *ch)
>   			ch->control_ch_num += CH_70MHZ_APART;
>   			break;
>   		default:
> -			WARN_ONCE(1, "Invalid chanspec 0x%04x\n", ch->chspec);
> +			WARN_ONCE(1,
> +				  "Invalid chanspec - unknown 11ac channel distance 0x%04x\n",
> +				  ch->chspec);

ditto

>   			break;
>   		}
>   		break;
>   	case BRCMU_CHSPEC_D11AC_BW_8080:
>   	default:
> -		WARN_ONCE(1, "Invalid chanspec 0x%04x\n", ch->chspec);
> +		WARN_ONCE(1,
> +			  "Invalid chanspec - unknown 11ac channel bandwidth 0x%04x\n",
> +			  ch->chspec);
>   		break;
>   	}
>   
>   	switch (ch->chspec & BRCMU_CHSPEC_D11AC_BND_MASK) {
> +	case BRCMU_CHSPEC_D11AC_BND_6G:
> +		ch->band = BRCMU_CHAN_BAND_6G;
> +		break;
>   	case BRCMU_CHSPEC_D11AC_BND_5G:
>   		ch->band = BRCMU_CHAN_BAND_5G;
>   		break;

[...]

> diff --git a/drivers/net/wireless/broadcom/brcm80211/include/brcmu_d11.h b/drivers/net/wireless/broadcom/brcm80211/include/brcmu_d11.h
> index f6344023855c..bb48b7442062 100644
> --- a/drivers/net/wireless/broadcom/brcm80211/include/brcmu_d11.h
> +++ b/drivers/net/wireless/broadcom/brcm80211/include/brcmu_d11.h
> @@ -69,24 +69,44 @@
>   #define  BRCMU_CHSPEC_D11AC_SB_UU	BRCMU_CHSPEC_D11AC_SB_LUU
>   #define  BRCMU_CHSPEC_D11AC_SB_L	BRCMU_CHSPEC_D11AC_SB_LLL
>   #define  BRCMU_CHSPEC_D11AC_SB_U	BRCMU_CHSPEC_D11AC_SB_LLU
> +/* channel sideband indication for frequency >= 240MHz */
> +#define BRCMU_CHSPEC_D11AC_320_SB_MASK	0x0780
> +#define BRCMU_CHSPEC_D11AC_320_SB_SHIFT	7
> +#define BRCMU_CHSPEC_D11AC_SB_LLLL	0x0000
> +#define BRCMU_CHSPEC_D11AC_SB_LLLU	0x0080
> +#define BRCMU_CHSPEC_D11AC_SB_LLUL	0x0100
> +#define BRCMU_CHSPEC_D11AC_SB_LLUU	0x0180
> +#define BRCMU_CHSPEC_D11AC_SB_LULL	0x0200
> +#define BRCMU_CHSPEC_D11AC_SB_LULU	0x0280
> +#define BRCMU_CHSPEC_D11AC_SB_LUUL	0x0300
> +#define BRCMU_CHSPEC_D11AC_SB_LUUU	0x0380
> +#define BRCMU_CHSPEC_D11AC_SB_ULLL	0x0400
> +#define BRCMU_CHSPEC_D11AC_SB_ULLU	0x0480
> +#define BRCMU_CHSPEC_D11AC_SB_ULUL	0x0500
> +#define BRCMU_CHSPEC_D11AC_SB_ULUU	0x0580
> +#define BRCMU_CHSPEC_D11AC_SB_UULL	0x0600
> +#define BRCMU_CHSPEC_D11AC_SB_UULU	0x0680
> +#define BRCMU_CHSPEC_D11AC_SB_UUUL	0x0700
> +#define BRCMU_CHSPEC_D11AC_SB_UUUU	0x0780

These are WCC specific, but I think it is okay to have these definitions 
here.

>   #define BRCMU_CHSPEC_D11AC_BW_MASK	0x3800
>   #define BRCMU_CHSPEC_D11AC_BW_SHIFT	11
> -#define  BRCMU_CHSPEC_D11AC_BW_5	0x0000
> -#define  BRCMU_CHSPEC_D11AC_BW_10	0x0800
> -#define  BRCMU_CHSPEC_D11AC_BW_20	0x1000
> -#define  BRCMU_CHSPEC_D11AC_BW_40	0x1800
> -#define  BRCMU_CHSPEC_D11AC_BW_80	0x2000
> -#define  BRCMU_CHSPEC_D11AC_BW_160	0x2800
> -#define  BRCMU_CHSPEC_D11AC_BW_8080	0x3000
> -#define BRCMU_CHSPEC_D11AC_BND_MASK	0xc000
> -#define BRCMU_CHSPEC_D11AC_BND_SHIFT	14
> -#define  BRCMU_CHSPEC_D11AC_BND_2G	0x0000
> -#define  BRCMU_CHSPEC_D11AC_BND_3G	0x4000
> -#define  BRCMU_CHSPEC_D11AC_BND_4G	0x8000
> -#define  BRCMU_CHSPEC_D11AC_BND_5G	0xc000
> +#define BRCMU_CHSPEC_D11AC_BW_10    0x0800
> +#define BRCMU_CHSPEC_D11AC_BW_20    0x1000
> +#define BRCMU_CHSPEC_D11AC_BW_40    0x1800
> +#define BRCMU_CHSPEC_D11AC_BW_80    0x2000
> +#define BRCMU_CHSPEC_D11AC_BW_160   0x2800
> +#define BRCMU_CHSPEC_D11AC_BW_320   0x0000

320MHz is 802.11be. No need to add this already, but not a biggy.

> +#define BRCMU_CHSPEC_D11AC_BW_8080  0x3000
> +#define BRCMU_CHSPEC_D11AC_BND_MASK 0xc000
> +#define BRCMU_CHSPEC_D11AC_BND_SHIFT 14
> +#define BRCMU_CHSPEC_D11AC_BND_2G   0x0000
> +#define BRCMU_CHSPEC_D11AC_BND_4G   0x8000
> +#define BRCMU_CHSPEC_D11AC_BND_5G   0xc000
> +#define BRCMU_CHSPEC_D11AC_BND_6G   0x4000
>   
>   #define BRCMU_CHAN_BAND_2G		0
>   #define BRCMU_CHAN_BAND_5G		1
> +#define BRCMU_CHAN_BAND_6G		2
>   
>   enum brcmu_chan_bw {
>   	BRCMU_CHAN_BW_20,


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